The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  0  2  0  2  0  2  0  2  2  2  2  2  2  2  4  2  4  2  4  2  4  4  4  4  0  4  4  2  4  2  0  4  1  1  1  1  1  1  1  1  2  1
 0  2  0  6  0  6  0  2  0  6  0  2  0  6  0  2  4  6  4  2  4  6  4  2  4  6  4  2  4  6  4  2  6  2  6  2  6  2  6  2  0  0  0  4  4  4  2  2  2  2  2  2  2  2  0  0  0  0  4  4  0  4  4  4  4  0  6  0  6  6  2  0  0  4  6
 0  0  4  0  0  0  4  0  0  4  0  4  4  4  4  4  4  0  4  0  4  0  4  0  0  4  0  4  0  4  0  4  0  0  0  0  4  4  4  4  0  4  4  4  4  0  4  4  4  4  0  0  0  0  0  0  4  4  4  4  0  0  0  0  4  0  0  4  0  0  0  0  4  4  0
 0  0  0  4  0  0  0  4  4  4  4  4  4  0  4  0  0  0  0  0  4  4  4  4  4  4  4  4  0  0  0  0  0  0  4  4  4  4  0  0  4  4  0  0  4  4  0  0  4  4  4  4  0  0  0  4  4  0  0  4  0  4  0  0  0  0  0  0  0  4  4  0  4  4  4
 0  0  0  0  4  4  4  4  4  0  0  4  0  4  4  0  0  0  4  4  4  4  0  0  0  4  4  0  4  0  0  4  0  4  4  0  0  4  4  0  4  0  4  4  0  4  4  0  0  4  4  0  0  4  4  0  4  0  0  4  0  0  0  4  4  0  0  4  4  4  0  4  0  4  0

generates a code of length 75 over Z8 who´s minimum homogenous weight is 72.

Homogenous weight enumerator: w(x)=1x^0+49x^72+24x^73+79x^74+16x^75+14x^76+20x^77+14x^78+32x^80+2x^81+3x^82+2x^105

The gray image is a code over GF(2) with n=300, k=8 and d=144.
This code was found by Heurico 1.16 in 0.176 seconds.